What powers recursionist.io?
Last seen Sep 2026 · 49 technologies across 21 categories
Advertising
Analytics
CDN
CMS
Databases
Font scripts
JavaScript frameworks
JavaScript graphics
JavaScript libraries
Miscellaneous
Page builders
Performance
Programming languages
Security
UI frameworks
Video players
Web servers
Widgets
WordPress plugins
WordPress themes
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
- Oct 2026 robots.txt appeared
- Oct 2026 * added to robots.txt
AI Crawlers
No AI crawlers blocked
Audience
- 97% desktop
- 3% phone
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.10 / 10 · ranked #3,334,200 of all domains
15 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.9 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English
- Weight: 1.7 MB · 31 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Recursion
- Industry: Education (declares
EducationalOrganization) - Profiles: X
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on DigitalOcean (159.89.192.197)
- DNS: Google Cloud DNS
- Email: Google Workspace
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Let's Encrypt, ECDSA P384, expires Dec 2026
- Common Crawl link graph: rank 6,757,932, 3 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| blog.recursionist.io | 27 |
| support.recursionist.io | 24 |
| recursionist.io | 18 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Cloudflare Bot Management May 2026
- detected Twitter Emoji (Twemoji) Dec 2025
- dropped Cloudflare Bot Management Nov 2025